Tyson Gay hit with one-year doping ban

American sprinter Tyson Gay has handed back his Olympic silver medal after receiving a one-year ban for testing positive for a prohibited substance.

The former world double champion won Olympic 4x100m relay silver at London 2012.

Gay, 31, has seen his results since July 15, 2012 - when he first used the prohibited substance - annulled, with the ban backdated to June 23, 2013 when he tested positive.

He will be able to return to competition next month and will be eligible for future Olympics and World Championships.

Gay escaped a ban of up to two years due to co-operating with the United States Anti-Doping Agency (USADA).

"We appreciate Tyson doing the right thing by immediately withdrawing from competition once he was notified, accepting responsibility for his decisions, and fully and truthfully co-operating with us," said USADA chief executive Travis Tygart.

The American 100m record holder, who is the joint second fastest man in history, admitted last July he had failed an out-of-competition doping test, saying: "I basically put my trust in someone and I was let down."